with import <nix/config.nix>; rec { inherit shell; path = coreutils; system = builtins.currentSystem; shared = builtins.getEnv "_NIX_TEST_SHARED"; mkDerivation = args: derivation ({ inherit system; builder = shell; args = ["-e" args.builder or (builtins.toFile "builder.sh" "eval \"$buildCommand\"")]; PATH = path; } // removeAttrs args ["builder" "meta"]) // { meta = args.meta or {}; }; }